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50
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 typedef struct {
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58
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13 ngx_str_t name;
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14 ngx_uint_t wildcard;
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50
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15 } ngx_http_rewrite_referer_t;
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16
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17
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18 typedef struct {
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58
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19 ngx_array_t *codes; /* uintptr_t */
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20 ngx_array_t *referers; /* ngx_http_rewrite_referer_t */
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50
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21
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64
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22 ngx_uint_t captures;
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58
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23 ngx_uint_t stack_size;
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24
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58
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25 ngx_flag_t log;
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26
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58
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27 ngx_flag_t no_referer;
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28 ngx_flag_t blocked_referer;
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50
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29 } ngx_http_rewrite_loc_conf_t;
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30
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31
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32 static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf);
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33 static char *ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf,
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34 void *parent, void *child);
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58
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35 static ngx_int_t ngx_http_rewrite_init(ngx_cycle_t *cycle);
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50
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36 static char *ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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37 static char *ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd,
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38 void *conf);
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76
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39 static char *ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd,
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40 void *conf);
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50
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41 static char *ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd,
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42 void *conf);
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43 static char * ngx_http_rewrite_if_condition(ngx_conf_t *cf,
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44 ngx_http_rewrite_loc_conf_t *lcf);
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45 static char *ngx_http_rewrite_variable(ngx_conf_t *cf,
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46 ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value);
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47 static char *ngx_http_rewrite_valid_referers(ngx_conf_t *cf,
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48 ngx_command_t *cmd, void *conf);
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58
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49 static char *ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd,
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50
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50 void *conf);
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51
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52
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53 static ngx_command_t ngx_http_rewrite_commands[] = {
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54
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55 { ngx_string("rewrite"),
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56 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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57 |NGX_CONF_TAKE23,
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58 ngx_http_rewrite,
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59 NGX_HTTP_LOC_CONF_OFFSET,
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60 0,
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61 NULL },
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62
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63 { ngx_string("return"),
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64 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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65 |NGX_CONF_TAKE1,
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66 ngx_http_rewrite_return,
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67 NGX_HTTP_LOC_CONF_OFFSET,
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68 0,
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69 NULL },
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70
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76
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71 { ngx_string("break"),
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72 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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73 |NGX_CONF_NOARGS,
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74 ngx_http_rewrite_break,
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75 NGX_HTTP_LOC_CONF_OFFSET,
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76 0,
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77 NULL },
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78
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50
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79 { ngx_string("if"),
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80 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE,
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81 ngx_http_rewrite_if,
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82 NGX_HTTP_LOC_CONF_OFFSET,
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83 0,
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84 NULL },
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85
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86 { ngx_string("valid_referers"),
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87 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
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88 ngx_http_rewrite_valid_referers,
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89 NGX_HTTP_LOC_CONF_OFFSET,
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90 0,
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91 NULL },
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92
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93 { ngx_string("set"),
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94 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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95 |NGX_CONF_TAKE2,
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96 ngx_http_rewrite_set,
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97 NGX_HTTP_LOC_CONF_OFFSET,
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98 0,
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99 NULL },
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100
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101 { ngx_string("rewrite_log"),
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102 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
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103 |NGX_CONF_TAKE1,
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104 ngx_conf_set_flag_slot,
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105 NGX_HTTP_LOC_CONF_OFFSET,
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106 offsetof(ngx_http_rewrite_loc_conf_t, log),
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107 NULL },
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108
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109 ngx_null_command
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110 };
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111
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112
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113 ngx_http_module_t ngx_http_rewrite_module_ctx = {
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114 NULL, /* preconfiguration */
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115 NULL, /* postconfiguration */
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116
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117 NULL, /* create main configuration */
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118 NULL, /* init main configuration */
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119
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120 NULL, /* create server configuration */
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121 NULL, /* merge server configuration */
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122
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123 ngx_http_rewrite_create_loc_conf, /* create location configration */
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124 ngx_http_rewrite_merge_loc_conf /* merge location configration */
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125 };
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126
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127
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128 ngx_module_t ngx_http_rewrite_module = {
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58
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129 NGX_MODULE_V1,
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130 &ngx_http_rewrite_module_ctx, /* module context */
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131 ngx_http_rewrite_commands, /* module directives */
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132 NGX_HTTP_MODULE, /* module type */
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133 ngx_http_rewrite_init, /* init module */
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134 NULL /* init process */
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135 };
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136
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137
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138 static ngx_http_variable_value_t ngx_http_rewrite_null_value =
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58
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139 { 0, ngx_string("") };
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50
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140
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141
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142 static ngx_int_t
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143 ngx_http_rewrite_handler(ngx_http_request_t *r)
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144 {
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145 ngx_http_script_code_pt code;
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146 ngx_http_script_engine_t *e;
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147 ngx_http_rewrite_loc_conf_t *cf;
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148
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149 cf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
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150
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151 if (cf->codes == NULL) {
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152 return NGX_DECLINED;
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153 }
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154
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155 e = ngx_pcalloc(r->pool, sizeof(ngx_http_script_engine_t));
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50
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156 if (e == NULL) {
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157 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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158 }
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159
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160 e->sp = ngx_pcalloc(r->pool,
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161 cf->stack_size * sizeof(ngx_http_variable_value_t));
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162 if (e->sp == NULL) {
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163 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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164 }
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165
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64
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166 if (cf->captures) {
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167 e->captures = ngx_palloc(r->pool, cf->captures * sizeof(int));
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168 if (e->captures == NULL) {
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169 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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170 }
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171
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172 } else {
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173 e->captures = NULL;
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174 }
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175
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176 e->ip = cf->codes->elts;
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177 e->request = r;
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178 e->quote = 1;
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179 e->log = cf->log;
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180 e->status = NGX_DECLINED;
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181
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182 while (*(uintptr_t *) e->ip) {
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183 code = *(ngx_http_script_code_pt *) e->ip;
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184 code(e);
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185 }
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186
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187 return e->status;
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188 }
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189
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190
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191 static void
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192 ngx_http_rewrite_invalid_referer_code(ngx_http_script_engine_t *e)
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193 {
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194 u_char *ref;
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195 size_t len;
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196 ngx_uint_t i, n;
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197 ngx_http_request_t *r;
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198 ngx_http_rewrite_referer_t *refs;
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199 ngx_http_rewrite_loc_conf_t *cf;
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200
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201 r = e->request;
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202
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203 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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204 "http rewrite invalid referer");
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205
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206 cf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
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207
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208 e->ip += sizeof(uintptr_t);
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209
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210 if (cf->referers == NULL) {
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211 e->sp->value = 0;
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212 e->sp->text.len = 0;
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213 e->sp->text.data = (u_char *) "";
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214 e->sp++;
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215
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216 return;
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217 }
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218
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219 if (r->headers_in.referer == NULL) {
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220 if (cf->no_referer) {
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221 e->sp->value = 0;
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222 e->sp->text.len = 0;
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223 e->sp->text.data = (u_char *) "";
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224 e->sp++;
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225
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226 return;
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227
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50
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228 } else {
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229 e->sp->value = 1;
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230 e->sp->text.len = 1;
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231 e->sp->text.data = (u_char *) "1";
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232 e->sp++;
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233
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234 return;
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235 }
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236 }
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237
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238 len = r->headers_in.referer->value.len;
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239 ref = r->headers_in.referer->value.data;
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240
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241 if (len < sizeof("http://i.ru") - 1
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242 || (ngx_strncasecmp(ref, "http://", 7) != 0))
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243 {
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244 if (cf->blocked_referer) {
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245 e->sp->value = 0;
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246 e->sp->text.len = 0;
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247 e->sp->text.data = (u_char *) "0";
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248 e->sp++;
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249
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250 return;
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50
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251
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54
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252 } else {
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253 e->sp->value = 1;
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254 e->sp->text.len = 1;
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255 e->sp->text.data = (u_char *) "1";
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256 e->sp++;
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257
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258 return;
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259 }
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50
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260 }
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261
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262 len -= 7;
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263 ref += 7;
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264
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265 refs = cf->referers->elts;
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266 for (i = 0; i < cf->referers->nelts; i++ ){
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267
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268 if (refs[i].name.len > len) {
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269 continue;
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270 }
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271
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272 if (refs[i].wildcard) {
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273 for (n = 0; n < len; n++) {
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274 if (ref[n] == '/' || ref[n] == ':') {
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275 break;
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276 }
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277
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278 if (ref[n] != '.') {
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279 continue;
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280 }
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281
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282 if (ngx_strncmp(&ref[n], refs[i].name.data,
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283 refs[i].name.len) == 0)
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284 {
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285 e->sp->value = 0;
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286 e->sp->text.len = 0;
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287 e->sp->text.data = (u_char *) "";
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288 e->sp++;
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289
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290 return;
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291 }
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292 }
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293
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294 } else {
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295 if (ngx_strncasecmp(refs[i].name.data, ref, refs[i].name.len) == 0)
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296 {
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297 e->sp->value = 0;
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298 e->sp->text.len = 0;
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299 e->sp->text.data = (u_char *) "";
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300 e->sp++;
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301
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302 return;
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303 }
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304 }
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305 }
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306
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307 e->sp->value = 1;
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308 e->sp->text.len = 1;
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309 e->sp->text.data = (u_char *) "1";
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310 e->sp++;
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311 }
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312
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313
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314 static ngx_http_variable_value_t *
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315 ngx_http_rewrite_var(ngx_http_request_t *r, uintptr_t data)
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316 {
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317 ngx_http_variable_t *var;
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318 ngx_http_core_main_conf_t *cmcf;
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319
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320 cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
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321
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322 var = cmcf->variables.elts;
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323
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324 /*
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325 * the ngx_http_rewrite_module sets variables directly in r->variables,
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326 * and they should be handled by ngx_http_get_indexed_variable(),
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327 * so the handler is called only if the variable is not initialized
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328 */
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329
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330 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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331 "using uninitialized \"%V\" variable", &var[data].name);
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332
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333 return &ngx_http_rewrite_null_value;
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334 }
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335
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336
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337 static void *
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338 ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf)
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339 {
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340 ngx_http_rewrite_loc_conf_t *conf;
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341
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342 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_rewrite_loc_conf_t));
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343 if (conf == NULL) {
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344 return NGX_CONF_ERROR;
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345 }
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346
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347 conf->stack_size = NGX_CONF_UNSET_UINT;
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348 conf->log = NGX_CONF_UNSET;
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349 conf->no_referer = NGX_CONF_UNSET;
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54
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350 conf->blocked_referer = NGX_CONF_UNSET;
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50
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351
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352 return conf;
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353 }
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354
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355
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356 static char *
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357 ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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358 {
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359 ngx_http_rewrite_loc_conf_t *prev = parent;
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360 ngx_http_rewrite_loc_conf_t *conf = child;
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361
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58
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362 uintptr_t *code;
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50
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363
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364 ngx_conf_merge_value(conf->log, prev->log, 0);
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365 ngx_conf_merge_unsigned_value(conf->stack_size, prev->stack_size, 10);
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366
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367 if (conf->referers == NULL) {
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368 conf->referers = prev->referers;
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369 ngx_conf_merge_value(conf->no_referer, prev->no_referer, 0);
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54
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370 ngx_conf_merge_value(conf->blocked_referer, prev->blocked_referer, 0);
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50
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371 }
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372
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373 if (conf->no_referer == NGX_CONF_UNSET) {
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374 conf->no_referer = 0;
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375 }
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376
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54
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377 if (conf->blocked_referer == NGX_CONF_UNSET) {
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378 conf->blocked_referer = 0;
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379 }
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380
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50
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381 if (conf->codes == NULL) {
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382 return NGX_CONF_OK;
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383 }
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384
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385 if (conf->codes == prev->codes) {
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386 return NGX_CONF_OK;
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387 }
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388
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389 code = ngx_array_push_n(conf->codes, sizeof(uintptr_t));
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390 if (code == NULL) {
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391 return NGX_CONF_ERROR;
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392 }
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393
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394 *code = (uintptr_t) NULL;
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395
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396 return NGX_CONF_OK;
|
|
|
397 }
|
|
|
398
|
|
|
399
|
|
58
|
400 static ngx_int_t
|
|
|
401 ngx_http_rewrite_init(ngx_cycle_t *cycle)
|
|
|
402 {
|
|
|
403 ngx_http_handler_pt *h;
|
|
|
404 ngx_http_core_main_conf_t *cmcf;
|
|
|
405
|
|
|
406 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
|
|
|
407
|
|
|
408 h = ngx_array_push(&cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers);
|
|
|
409 if (h == NULL) {
|
|
|
410 return NGX_ERROR;
|
|
|
411 }
|
|
|
412
|
|
|
413 *h = ngx_http_rewrite_handler;
|
|
|
414
|
|
|
415 return NGX_OK;
|
|
|
416 }
|
|
|
417
|
|
|
418
|
|
50
|
419 static char *
|
|
|
420 ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
421 {
|
|
|
422 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
423
|
|
58
|
424 ngx_str_t *value, err;
|
|
|
425 ngx_int_t n;
|
|
|
426 ngx_uint_t last;
|
|
|
427 ngx_http_script_code_pt *code;
|
|
|
428 ngx_http_script_compile_t sc;
|
|
|
429 ngx_http_script_regex_code_t *regex;
|
|
|
430 ngx_http_script_regex_end_code_t *regex_end;
|
|
|
431 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
50
|
432
|
|
58
|
433 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
434 sizeof(ngx_http_script_regex_code_t));
|
|
50
|
435 if (regex == NULL) {
|
|
|
436 return NGX_CONF_ERROR;
|
|
|
437 }
|
|
|
438
|
|
58
|
439 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
|
|
|
440
|
|
50
|
441 value = cf->args->elts;
|
|
|
442
|
|
|
443 err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
444 err.data = errstr;
|
|
|
445
|
|
|
446 /* TODO: NGX_REGEX_CASELESS */
|
|
|
447
|
|
|
448 regex->regex = ngx_regex_compile(&value[1], 0, cf->pool, &err);
|
|
|
449
|
|
|
450 if (regex->regex == NULL) {
|
|
|
451 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data);
|
|
|
452 return NGX_CONF_ERROR;
|
|
|
453 }
|
|
|
454
|
|
58
|
455 regex->code = ngx_http_script_regex_start_code;
|
|
50
|
456 regex->uri = 1;
|
|
|
457 regex->name = value[1];
|
|
|
458
|
|
58
|
459 if (value[2].data[value[2].len - 1] == '?') {
|
|
|
460
|
|
|
461 /* the last "?" drops the original arguments */
|
|
|
462 value[2].len--;
|
|
|
463
|
|
|
464 } else {
|
|
|
465 regex->add_args = 1;
|
|
|
466 }
|
|
|
467
|
|
50
|
468 last = 0;
|
|
|
469
|
|
|
470 if (ngx_strncmp(value[2].data, "http://", sizeof("http://") - 1) == 0) {
|
|
|
471 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
|
|
|
472 regex->redirect = 1;
|
|
|
473 last = 1;
|
|
|
474 }
|
|
|
475
|
|
|
476 if (cf->args->nelts == 4) {
|
|
|
477 if (ngx_strcmp(value[3].data, "last") == 0) {
|
|
|
478 last = 1;
|
|
|
479
|
|
|
480 } else if (ngx_strcmp(value[3].data, "break") == 0) {
|
|
|
481 regex->break_cycle = 1;
|
|
|
482 last = 1;
|
|
|
483
|
|
|
484 } else if (ngx_strcmp(value[3].data, "redirect") == 0) {
|
|
|
485 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
|
|
|
486 regex->redirect = 1;
|
|
|
487 last = 1;
|
|
|
488
|
|
|
489 } else if (ngx_strcmp(value[3].data, "permanent") == 0) {
|
|
|
490 regex->status = NGX_HTTP_MOVED_PERMANENTLY;
|
|
|
491 regex->redirect = 1;
|
|
|
492 last = 1;
|
|
|
493
|
|
|
494 } else {
|
|
|
495 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
496 "invalid parameter \"%V\"", &value[3]);
|
|
|
497 return NGX_CONF_ERROR;
|
|
|
498 }
|
|
|
499 }
|
|
|
500
|
|
58
|
501 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
50
|
502
|
|
58
|
503 sc.cf = cf;
|
|
|
504 sc.source = &value[2];
|
|
|
505 sc.lengths = ®ex->lengths;
|
|
|
506 sc.values = &lcf->codes;
|
|
|
507 sc.variables = ngx_http_script_variables_count(&value[2]);
|
|
|
508 sc.main = regex;
|
|
|
509 sc.complete_lengths = 1;
|
|
|
510 sc.compile_args = !regex->redirect;
|
|
50
|
511
|
|
58
|
512 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
513 return NGX_CONF_ERROR;
|
|
|
514 }
|
|
50
|
515
|
|
58
|
516 regex = sc.main;
|
|
50
|
517
|
|
58
|
518 regex->ncaptures = sc.ncaptures;
|
|
|
519 regex->size = sc.size;
|
|
|
520 regex->args = sc.args;
|
|
50
|
521
|
|
58
|
522 if (sc.variables == 0) {
|
|
|
523 regex->lengths = NULL;
|
|
50
|
524 }
|
|
|
525
|
|
|
526 n = ngx_regex_capture_count(regex->regex);
|
|
|
527
|
|
|
528 if (n < 0) {
|
|
|
529 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
530 ngx_regex_capture_count_n " failed for "
|
|
|
531 "pattern \"%V\"", &value[1]);
|
|
|
532 return NGX_CONF_ERROR;
|
|
|
533 }
|
|
|
534
|
|
|
535 if (regex->ncaptures > (ngx_uint_t) n) {
|
|
|
536 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
537 "pattern \"%V\" has less captures "
|
|
|
538 "than referrenced in substitution \"%V\"",
|
|
|
539 &value[1], &value[2]);
|
|
|
540 return NGX_CONF_ERROR;
|
|
|
541 }
|
|
|
542
|
|
|
543 if (regex->ncaptures < (ngx_uint_t) n) {
|
|
|
544 regex->ncaptures = (ngx_uint_t) n;
|
|
|
545 }
|
|
|
546
|
|
|
547 if (regex->ncaptures) {
|
|
|
548 regex->ncaptures = (regex->ncaptures + 1) * 3;
|
|
|
549
|
|
64
|
550 if (lcf->captures < regex->ncaptures) {
|
|
|
551 lcf->captures = regex->ncaptures;
|
|
|
552 }
|
|
58
|
553 }
|
|
|
554
|
|
|
555 regex_end = ngx_http_script_add_code(lcf->codes,
|
|
|
556 sizeof(ngx_http_script_regex_end_code_t),
|
|
|
557 ®ex);
|
|
50
|
558 if (regex_end == NULL) {
|
|
|
559 return NGX_CONF_ERROR;
|
|
|
560 }
|
|
|
561
|
|
58
|
562 regex_end->code = ngx_http_script_regex_end_code;
|
|
50
|
563 regex_end->uri = regex->uri;
|
|
|
564 regex_end->args = regex->args;
|
|
58
|
565 regex_end->add_args = regex->add_args;
|
|
50
|
566 regex_end->redirect = regex->redirect;
|
|
|
567
|
|
|
568 if (last) {
|
|
66
|
569 code = ngx_http_script_add_code(lcf->codes, sizeof(uintptr_t), ®ex);
|
|
50
|
570 if (code == NULL) {
|
|
|
571 return NGX_CONF_ERROR;
|
|
|
572 }
|
|
|
573
|
|
|
574 *code = (uintptr_t) NULL;
|
|
|
575 }
|
|
|
576
|
|
|
577 regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
|
|
|
578 - (u_char *) regex;
|
|
|
579
|
|
|
580 return NGX_CONF_OK;
|
|
|
581 }
|
|
|
582
|
|
|
583
|
|
|
584 static char *
|
|
|
585 ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
586 {
|
|
|
587 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
588
|
|
58
|
589 ngx_str_t *value;
|
|
|
590 ngx_http_script_return_code_t *ret;
|
|
50
|
591
|
|
58
|
592 ret = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
593 sizeof(ngx_http_script_return_code_t));
|
|
50
|
594 if (ret == NULL) {
|
|
|
595 return NGX_CONF_ERROR;
|
|
|
596 }
|
|
|
597
|
|
|
598 value = cf->args->elts;
|
|
|
599
|
|
58
|
600 ret->code = ngx_http_script_return_code;
|
|
50
|
601 ret->null = (uintptr_t) NULL;
|
|
|
602
|
|
|
603 ret->status = ngx_atoi(value[1].data, value[1].len);
|
|
|
604
|
|
|
605 if (ret->status == (uintptr_t) NGX_ERROR) {
|
|
|
606 return NGX_CONF_ERROR;
|
|
|
607 }
|
|
|
608
|
|
|
609 return NGX_CONF_OK;
|
|
|
610 }
|
|
|
611
|
|
|
612
|
|
|
613 static char *
|
|
76
|
614 ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
615 {
|
|
|
616 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
617
|
|
|
618 ngx_http_script_code_pt *code;
|
|
|
619
|
|
|
620 code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(uintptr_t));
|
|
|
621 if (code == NULL) {
|
|
|
622 return NGX_CONF_ERROR;
|
|
|
623 }
|
|
|
624
|
|
|
625 *code = ngx_http_script_break_code;
|
|
|
626
|
|
|
627 return NGX_CONF_OK;
|
|
|
628 }
|
|
|
629
|
|
|
630
|
|
|
631 static char *
|
|
50
|
632 ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
633 {
|
|
|
634 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
635
|
|
|
636 void *mconf;
|
|
|
637 char *rv;
|
|
|
638 u_char *elts;
|
|
|
639 ngx_uint_t i;
|
|
|
640 ngx_conf_t save;
|
|
|
641 ngx_http_module_t *module;
|
|
|
642 ngx_http_conf_ctx_t *ctx, *pctx;
|
|
|
643 ngx_http_core_loc_conf_t *clcf, *pclcf, **clcfp;
|
|
58
|
644 ngx_http_script_if_code_t *if_code;
|
|
50
|
645 ngx_http_rewrite_loc_conf_t *nlcf;
|
|
|
646
|
|
|
647 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
|
|
|
648 if (ctx == NULL) {
|
|
|
649 return NGX_CONF_ERROR;
|
|
|
650 }
|
|
|
651
|
|
|
652 pctx = cf->ctx;
|
|
|
653 ctx->main_conf = pctx->main_conf;
|
|
|
654 ctx->srv_conf = pctx->srv_conf;
|
|
|
655
|
|
|
656 ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
|
|
|
657 if (ctx->loc_conf == NULL) {
|
|
|
658 return NGX_CONF_ERROR;
|
|
|
659 }
|
|
|
660
|
|
|
661 for (i = 0; ngx_modules[i]; i++) {
|
|
|
662 if (ngx_modules[i]->type != NGX_HTTP_MODULE) {
|
|
|
663 continue;
|
|
|
664 }
|
|
|
665
|
|
|
666 module = ngx_modules[i]->ctx;
|
|
|
667
|
|
|
668 if (module->create_loc_conf) {
|
|
|
669
|
|
|
670 mconf = module->create_loc_conf(cf);
|
|
|
671 if (mconf == NULL) {
|
|
|
672 return NGX_CONF_ERROR;
|
|
|
673 }
|
|
|
674
|
|
|
675 ctx->loc_conf[ngx_modules[i]->ctx_index] = mconf;
|
|
|
676 }
|
|
|
677 }
|
|
|
678
|
|
|
679 pclcf = pctx->loc_conf[ngx_http_core_module.ctx_index];
|
|
|
680
|
|
|
681 clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
|
|
|
682 clcf->loc_conf = ctx->loc_conf;
|
|
|
683 clcf->name = pclcf->name;
|
|
|
684 clcf->noname = 1;
|
|
|
685
|
|
|
686 if (pclcf->locations.elts == NULL) {
|
|
|
687 if (ngx_array_init(&pclcf->locations, cf->pool, 4, sizeof(void *))
|
|
|
688 == NGX_ERROR)
|
|
|
689 {
|
|
|
690 return NGX_CONF_ERROR;
|
|
|
691 }
|
|
|
692 }
|
|
|
693
|
|
|
694 clcfp = ngx_array_push(&pclcf->locations);
|
|
|
695 if (clcfp == NULL) {
|
|
|
696 return NGX_CONF_ERROR;
|
|
|
697 }
|
|
|
698
|
|
|
699 *clcfp = clcf;
|
|
|
700
|
|
|
701
|
|
|
702 if (ngx_http_rewrite_if_condition(cf, lcf) != NGX_CONF_OK) {
|
|
|
703 return NGX_CONF_ERROR;
|
|
|
704 }
|
|
|
705
|
|
58
|
706 if_code = ngx_array_push_n(lcf->codes, sizeof(ngx_http_script_if_code_t));
|
|
50
|
707 if (if_code == NULL) {
|
|
|
708 return NULL;
|
|
|
709 }
|
|
|
710
|
|
58
|
711 if_code->code = ngx_http_script_if_code;
|
|
50
|
712
|
|
|
713 elts = lcf->codes->elts;
|
|
|
714
|
|
|
715
|
|
|
716 /* the inside directives must compile to the same code array */
|
|
|
717
|
|
|
718 nlcf = ctx->loc_conf[ngx_http_rewrite_module.ctx_index];
|
|
|
719 nlcf->codes = lcf->codes;
|
|
|
720
|
|
|
721
|
|
|
722 save = *cf;
|
|
|
723 cf->ctx = ctx;
|
|
|
724
|
|
|
725 if (pclcf->name.len == 0) {
|
|
|
726 if_code->loc_conf = NULL;
|
|
|
727 cf->cmd_type = NGX_HTTP_SIF_CONF;
|
|
|
728
|
|
|
729 } else {
|
|
|
730 if_code->loc_conf = ctx->loc_conf;
|
|
|
731 cf->cmd_type = NGX_HTTP_LIF_CONF;
|
|
|
732 }
|
|
|
733
|
|
|
734 rv = ngx_conf_parse(cf, NULL);
|
|
|
735
|
|
|
736 *cf = save;
|
|
|
737
|
|
|
738 if (rv != NGX_CONF_OK) {
|
|
|
739 return rv;
|
|
|
740 }
|
|
|
741
|
|
|
742
|
|
66
|
743 if (lcf->captures < nlcf->captures) {
|
|
|
744 lcf->captures = nlcf->captures;
|
|
|
745 }
|
|
|
746
|
|
|
747
|
|
50
|
748 if (elts != lcf->codes->elts) {
|
|
58
|
749 if_code = (ngx_http_script_if_code_t *)
|
|
50
|
750 ((u_char *) if_code + ((u_char *) lcf->codes->elts - elts));
|
|
|
751 }
|
|
|
752
|
|
|
753 if_code->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
|
|
|
754 - (u_char *) if_code;
|
|
|
755
|
|
|
756 return NGX_CONF_OK;
|
|
|
757 }
|
|
|
758
|
|
|
759
|
|
|
760 static char *
|
|
|
761 ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf)
|
|
|
762 {
|
|
58
|
763 ngx_str_t *value, err;
|
|
64
|
764 ngx_uint_t cur, last, n;
|
|
58
|
765 ngx_http_script_regex_code_t *regex;
|
|
|
766 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
50
|
767
|
|
|
768 value = cf->args->elts;
|
|
|
769 last = cf->args->nelts - 1;
|
|
|
770
|
|
|
771 if (value[1].len < 1 || value[1].data[0] != '(') {
|
|
|
772 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
773 "invalid condition \"%V\"", &value[1]);
|
|
|
774 return NGX_CONF_ERROR;
|
|
|
775 }
|
|
|
776
|
|
|
777 if (value[1].len == 1) {
|
|
|
778 cur = 2;
|
|
|
779
|
|
|
780 } else {
|
|
|
781 cur = 1;
|
|
|
782 value[1].len--;
|
|
|
783 value[1].data++;
|
|
|
784 }
|
|
|
785
|
|
|
786 if (value[last].len < 1 || value[last].data[value[last].len - 1] != ')') {
|
|
|
787 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
788 "invalid condition \"%V\"", &value[last]);
|
|
|
789 return NGX_CONF_ERROR;
|
|
|
790 }
|
|
|
791
|
|
|
792 if (value[last].len == 1) {
|
|
|
793 last--;
|
|
|
794
|
|
|
795 } else {
|
|
|
796 value[last].len--;
|
|
|
797 value[last].data[value[last].len] = '\0';
|
|
|
798 }
|
|
|
799
|
|
|
800 if (value[cur].len > 1 && value[cur].data[0] == '$') {
|
|
|
801
|
|
|
802 if (cur != last && cur + 2 != last) {
|
|
|
803 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
804 "invalid condition \"%V\"", &value[cur]);
|
|
|
805 return NGX_CONF_ERROR;
|
|
|
806 }
|
|
|
807
|
|
|
808 if (ngx_http_rewrite_variable(cf, lcf, &value[cur])!= NGX_CONF_OK) {
|
|
|
809 return NGX_CONF_ERROR;
|
|
|
810 }
|
|
|
811
|
|
|
812 if (cur == last) {
|
|
|
813 return NGX_CONF_OK;
|
|
|
814 }
|
|
|
815
|
|
|
816 cur++;
|
|
|
817
|
|
|
818 if ((value[cur].len == 1 && value[cur].data[0] != '~')
|
|
|
819 || (value[cur].len == 2
|
|
|
820 && value[cur].data[0] != '~' && value[cur].data[1] != '*'))
|
|
|
821 {
|
|
|
822 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
823 "unexpected \"%V\" in condition", &value[cur]);
|
|
|
824 return NGX_CONF_ERROR;
|
|
|
825 }
|
|
|
826
|
|
58
|
827 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
828 sizeof(ngx_http_script_regex_code_t));
|
|
50
|
829 if (regex == NULL) {
|
|
|
830 return NGX_CONF_ERROR;
|
|
|
831 }
|
|
|
832
|
|
58
|
833 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
|
|
|
834
|
|
50
|
835 err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
836 err.data = errstr;
|
|
|
837
|
|
|
838 regex->regex = ngx_regex_compile(&value[last],
|
|
|
839 (value[cur].len == 2) ? NGX_REGEX_CASELESS : 0,
|
|
|
840 cf->pool, &err);
|
|
|
841
|
|
|
842 if (regex->regex == NULL) {
|
|
|
843 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s", err.data);
|
|
|
844 return NGX_CONF_ERROR;
|
|
|
845 }
|
|
|
846
|
|
58
|
847 regex->code = ngx_http_script_regex_start_code;
|
|
|
848 regex->next = sizeof(ngx_http_script_regex_code_t);
|
|
50
|
849 regex->test = 1;
|
|
|
850 regex->name = value[last];
|
|
|
851
|
|
64
|
852 n = ngx_regex_capture_count(regex->regex);
|
|
|
853
|
|
|
854 if (n) {
|
|
|
855 regex->ncaptures = (n + 1) * 3;
|
|
|
856
|
|
|
857 if (lcf->captures < regex->ncaptures) {
|
|
|
858 lcf->captures = regex->ncaptures;
|
|
|
859 }
|
|
|
860 }
|
|
|
861
|
|
50
|
862 return NGX_CONF_OK;
|
|
|
863 }
|
|
|
864
|
|
|
865 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
866 "invalid condition \"%V\"", &value[cur]);
|
|
|
867
|
|
|
868 return NGX_CONF_ERROR;
|
|
|
869 }
|
|
|
870
|
|
|
871
|
|
|
872 static char *
|
|
|
873 ngx_http_rewrite_variable(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf,
|
|
|
874 ngx_str_t *value)
|
|
|
875 {
|
|
58
|
876 ngx_int_t index;
|
|
|
877 ngx_http_script_code_pt *code;
|
|
|
878 ngx_http_script_var_code_t *var_code;
|
|
50
|
879
|
|
|
880 value->len--;
|
|
|
881 value->data++;
|
|
|
882
|
|
|
883 if (value->len == sizeof("invalid_referer") - 1
|
|
|
884 && ngx_strncmp(value->data, "invalid_referer",
|
|
|
885 sizeof("invalid_referer") - 1) == 0)
|
|
|
886 {
|
|
58
|
887 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
888 sizeof(ngx_http_script_code_pt));
|
|
50
|
889 if (code == NULL) {
|
|
|
890 return NGX_CONF_ERROR;
|
|
|
891 }
|
|
|
892
|
|
|
893 *code = ngx_http_rewrite_invalid_referer_code;
|
|
|
894
|
|
|
895 } else {
|
|
58
|
896 index = ngx_http_get_variable_index(cf, value);
|
|
50
|
897
|
|
58
|
898 if (index == NGX_ERROR) {
|
|
50
|
899 return NGX_CONF_ERROR;
|
|
|
900 }
|
|
|
901
|
|
58
|
902 var_code = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
903 sizeof(ngx_http_script_var_code_t));
|
|
50
|
904 if (var_code == NULL) {
|
|
|
905 return NGX_CONF_ERROR;
|
|
|
906 }
|
|
|
907
|
|
58
|
908 var_code->code = ngx_http_script_var_code;
|
|
|
909 var_code->index = index;
|
|
50
|
910 }
|
|
|
911
|
|
|
912 return NGX_CONF_OK;
|
|
|
913 }
|
|
|
914
|
|
|
915
|
|
|
916 static char *
|
|
|
917 ngx_http_rewrite_valid_referers(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
918 {
|
|
|
919 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
920
|
|
|
921 ngx_uint_t i, server_names;
|
|
|
922 ngx_str_t *value;
|
|
|
923 ngx_http_server_name_t *sn;
|
|
|
924 ngx_http_core_srv_conf_t *cscf;
|
|
|
925 ngx_http_rewrite_referer_t *ref;
|
|
|
926
|
|
|
927 cscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_core_module);
|
|
|
928
|
|
|
929 if (lcf->referers == NULL) {
|
|
|
930 lcf->referers = ngx_array_create(cf->pool,
|
|
|
931 cf->args->nelts + cscf->server_names.nelts,
|
|
|
932 sizeof(ngx_http_rewrite_referer_t));
|
|
|
933 if (lcf->referers == NULL) {
|
|
|
934 return NGX_CONF_ERROR;
|
|
|
935 }
|
|
|
936 }
|
|
|
937
|
|
|
938 value = cf->args->elts;
|
|
|
939 server_names = 0;
|
|
|
940
|
|
|
941 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
942 if (value[i].len == 0) {
|
|
|
943 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
944 "invalid referer \"%V\"", &value[i]);
|
|
|
945 return NGX_CONF_ERROR;
|
|
|
946 }
|
|
|
947
|
|
|
948 if (ngx_strcmp(value[i].data, "none") == 0) {
|
|
|
949 lcf->no_referer = 1;
|
|
|
950 continue;
|
|
|
951 }
|
|
|
952
|
|
54
|
953 if (ngx_strcmp(value[i].data, "blocked") == 0) {
|
|
|
954 lcf->blocked_referer = 1;
|
|
|
955 continue;
|
|
|
956 }
|
|
|
957
|
|
50
|
958 if (ngx_strcmp(value[i].data, "server_names") == 0) {
|
|
|
959 server_names = 1;
|
|
|
960 continue;
|
|
|
961 }
|
|
|
962
|
|
|
963 ref = ngx_array_push(lcf->referers);
|
|
|
964 if (ref == NULL) {
|
|
|
965 return NGX_CONF_ERROR;
|
|
|
966 }
|
|
|
967
|
|
|
968 if (value[i].data[0] != '*') {
|
|
|
969 ref->name = value[i];
|
|
|
970 ref->wildcard = 0;
|
|
|
971 continue;
|
|
|
972 }
|
|
|
973
|
|
|
974 if (value[i].data[1] != '.') {
|
|
|
975 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
976 "invalid wildcard referer \"%V\"", &value[i]);
|
|
|
977 return NGX_CONF_ERROR;
|
|
|
978 }
|
|
|
979
|
|
|
980 ref->name.len = value[i].len - 1;
|
|
|
981 ref->name.data = value[i].data + 1;
|
|
|
982 ref->wildcard = 1;
|
|
|
983 }
|
|
|
984
|
|
|
985 if (!server_names) {
|
|
|
986 return NGX_CONF_OK;
|
|
|
987 }
|
|
|
988
|
|
|
989 sn = cscf->server_names.elts;
|
|
|
990 for (i = 0; i < cscf->server_names.nelts; i++) {
|
|
|
991 ref = ngx_array_push(lcf->referers);
|
|
|
992 if (ref == NULL) {
|
|
|
993 return NGX_CONF_ERROR;
|
|
|
994 }
|
|
|
995
|
|
|
996 ref->name.len = sn[i].name.len + 1;
|
|
|
997 ref->name.data = ngx_palloc(cf->pool, ref->name.len);
|
|
|
998 if (ref->name.data == NULL) {
|
|
|
999 return NGX_CONF_ERROR;
|
|
|
1000 }
|
|
|
1001
|
|
|
1002 ngx_memcpy(ref->name.data, sn[i].name.data, sn[i].name.len);
|
|
|
1003 ref->name.data[sn[i].name.len] = '/';
|
|
|
1004 ref->wildcard = sn[i].wildcard;
|
|
|
1005 }
|
|
|
1006
|
|
|
1007 return NGX_CONF_OK;
|
|
|
1008 }
|
|
|
1009
|
|
|
1010
|
|
|
1011 static char *
|
|
|
1012 ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
1013 {
|
|
|
1014 ngx_http_rewrite_loc_conf_t *lcf = conf;
|
|
|
1015
|
|
64
|
1016 ngx_int_t n, index;
|
|
|
1017 ngx_str_t *value;
|
|
|
1018 ngx_http_variable_t *v;
|
|
|
1019 ngx_http_script_compile_t sc;
|
|
|
1020 ngx_http_script_var_code_t *var;
|
|
|
1021 ngx_http_script_value_code_t *val;
|
|
|
1022 ngx_http_script_complex_value_code_t *complex;
|
|
50
|
1023
|
|
|
1024 value = cf->args->elts;
|
|
|
1025
|
|
|
1026 if (value[1].data[0] != '$') {
|
|
|
1027 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
1028 "invalid variable name \"%V\"", &value[1]);
|
|
|
1029 return NGX_CONF_ERROR;
|
|
|
1030 }
|
|
|
1031
|
|
|
1032 value[1].len--;
|
|
|
1033 value[1].data++;
|
|
|
1034
|
|
58
|
1035 v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGABLE);
|
|
50
|
1036 if (v == NULL) {
|
|
|
1037 return NGX_CONF_ERROR;
|
|
|
1038 }
|
|
|
1039
|
|
58
|
1040 index = ngx_http_get_variable_index(cf, &value[1]);
|
|
|
1041 if (index == NGX_ERROR) {
|
|
|
1042 return NGX_CONF_ERROR;
|
|
|
1043 }
|
|
50
|
1044
|
|
58
|
1045 v->handler = ngx_http_rewrite_var;
|
|
|
1046 v->data = index;
|
|
|
1047
|
|
64
|
1048 n = ngx_http_script_variables_count(&value[2]);
|
|
|
1049
|
|
|
1050 if (n == 0) {
|
|
|
1051 val = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
1052 sizeof(ngx_http_script_value_code_t));
|
|
|
1053 if (val == NULL) {
|
|
|
1054 return NGX_CONF_ERROR;
|
|
|
1055 }
|
|
50
|
1056
|
|
64
|
1057 n = ngx_atoi(value[2].data, value[2].len);
|
|
|
1058
|
|
|
1059 if (n == NGX_ERROR) {
|
|
|
1060 n = 0;
|
|
|
1061 }
|
|
|
1062
|
|
|
1063 val->code = ngx_http_script_value_code;
|
|
|
1064 val->value = (uintptr_t) n;
|
|
|
1065 val->text_len = (uintptr_t) value[2].len;
|
|
|
1066 val->text_data = (uintptr_t) value[2].data;
|
|
50
|
1067
|
|
64
|
1068 } else {
|
|
|
1069 complex = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
1070 sizeof(ngx_http_script_complex_value_code_t));
|
|
|
1071 if (complex == NULL) {
|
|
|
1072 return NGX_CONF_ERROR;
|
|
|
1073 }
|
|
|
1074
|
|
|
1075 complex->code = ngx_http_script_complex_value_code;
|
|
|
1076 complex->lengths = NULL;
|
|
|
1077
|
|
|
1078 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
50
|
1079
|
|
64
|
1080 sc.cf = cf;
|
|
|
1081 sc.source = &value[2];
|
|
|
1082 sc.lengths = &complex->lengths;
|
|
|
1083 sc.values = &lcf->codes;
|
|
|
1084 sc.variables = n;
|
|
|
1085 sc.complete_lengths = 1;
|
|
|
1086
|
|
|
1087 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
1088 return NGX_CONF_ERROR;
|
|
|
1089 }
|
|
|
1090 }
|
|
50
|
1091
|
|
58
|
1092 var = ngx_http_script_start_code(cf->pool, &lcf->codes,
|
|
|
1093 sizeof(ngx_http_script_var_code_t));
|
|
50
|
1094 if (var == NULL) {
|
|
|
1095 return NGX_CONF_ERROR;
|
|
|
1096 }
|
|
|
1097
|
|
58
|
1098 var->code = ngx_http_script_set_var_code;
|
|
|
1099 var->index = (uintptr_t) index;
|
|
50
|
1100
|
|
|
1101 return NGX_CONF_OK;
|
|
|
1102 }
|
